Uncategorized
-
Pot on the Spot: Marijuana’s risks become blurrier
A research review challenges the assumption that scientists have demonstrated a causal link between teenage marijuana use and later psychological and behavioral problems.
- Astronomy
Old Stars Even Older: Determining a new age for the universe
Using particles accelerators to mimic the conditions inside stars, two independent research groups have found evidence that the most-ancient known stars are about a billion years older than astronomers had estimated.
- Humans
Letters from the May 22, 2004, issue of Science News
Further options “Surgical Option: Hysterectomy may top drugs for women with heavy bleeding” (SN: 3/27/04, p. 196: Surgical Option: Hysterectomy may top drugs for women with heavy bleeding) doesn’t mention that 13 to 20 percent of women with heavy menstrual periods have a common but often undiagnosed bleeding disorder called von Willebrand disease. Because this […]
- Paleontology
Rare English bits are oldest known charcoal
Analyses of small black chunks of material extracted from 420-million-year-old rocks found along the England-Wales border suggest that they're remnants of the earliest known wildfire.
- Archaeology
Guatemalan sites yield Maya insights
Excavations at three archaeological sites in Guatemala have provided new insights into both the early and late stages of ancient Maya civilization.
- Astronomy
Before the big one hits
The next time you hear about an asteroid or comet about to hit Earth, you can go to a new Internet site to find out where the collision will be and how much damage will occur.
-
Neurons slow down for placebo effect
A placebo treatment temporarily quelled symptoms of Parkinson's disease in six people by decreasing the electrical activity of brain cells crucial to the condition.
- Health & Medicine
Herbal erection pills may be spiked
Some pills marketed as herbal remedies for erectile dysfunction contain drugs that should be available only by prescription.
- Earth
Filtered air cuts down mutations
Microscopic particles in the air may mutate the DNA of sperm.
-
Two egg cells make fatherless mouse
By fusing two egg cells, researchers have created a mouse with no father.
- Astronomy
Windy endeavor
In early April, an Earth-orbiting satellite closed its doors after more than 2 years of collecting ions from the solar wind.
- Astronomy
Dark Doings
A slew of new and proposed experiments, ranging from the cosmic to the subatomic scale, may shed light on why the expansion of the universe is speeding up.
